Bayesian Approach to Light Curve Inversion of 2020 SO

Near Earth Object (NEO) 2020 SO is believed to be a Centaur rocket booster from the mid 1960’s that was temporarily recaptured by the Earth. 2020 SO entered Earth’s Hill sphere in November 2020, with close approaches in December 2020 and February 2021, where it became bright enough (approximately 14 V magnitude) to be observed by Raven-class (< 1 m) telescopes. In this paper, 2020 SO’s spin state and reflective properties are estimated using data collected from multiple telescope sites around the world during both close approaches. The 95